Carbon nanotube / fluorocarbon resin composite microsphere photo-thermal super-hydrophobic anti-condensation coating and preparation method thereof

Abstract

The embodiment of the invention provides a carbon nanotube / fluorocarbon resin composite microsphere photo-thermal super-hydrophobic anti-condensation coating and a preparation method thereof.The preparation method comprises the steps that firstly, carbon nanotubes and fluorocarbon resin are evenly dispersed in a solvent, then a small amount of non-solvent water is added to enable a solution system to be subjected to phase separation, and carbon nanotube / fluorocarbon resin composite microsphere dispersion liquid is formed; and finally, spraying the carbon nanotube / fluorocarbon resin composite microsphere dispersion liquid, and curing to obtain the photo-thermal super-hydrophobic anti-condensation coating. The carbon nano tube is in a microsphere shape in the coating, so that a typical micro / nano coarse structure is obtained on the surface, the water drop contact angle of the coating is as high as 158 degrees, the icing delay time is as high as 434s, and the ice adhesion force is as low as 16kPa; under the irradiation of sunlight, the temperature of the coating can be increased to 54.5 DEG C within 10 minutes under the photo-thermal action of the carbon nanotubes, so that the melting of ice is accelerated.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the technical field of coating materials, in particular to a kind of carbon nanotube / fluorocarbon resin composite microsphere photo-thermal super-hydrophobic anti-condensation coating and preparation method thereof. BACKGROUND

[0002] Material surface icing is a common natural phenomenon in life, however, excessive ice accumulation often brings inconvenience to people in aviation transportation, wind power generation, power transmission, ground transportation and the like, causes huge economic losses, and even directly endangers people's life safety, so it is necessary to solve the problem of material surface icing. At present, the main deicing methods usually involve traditional chemical deicing agents, heat treatment and mechanical methods and the like, but these deicing methods mostly have certain disadvantages such as high cost, response lag, high energy consumption and environmental pollution. Therefore, it is crucial to seek a simple, efficient and low-cost anti-icing and deicing method. SUMMARY

[0003] The embodiment of the present application aims to at least solve one of the technical problems existing in the prior art, and provides a kind of carbon nanotube / fluorocarbon resin composite microsphere photo-thermal super-hydrophobic anti-condensation coating and preparation method thereof.

[0004] In a first aspect, the embodiment of the present application provides a preparation method of a carbon nanotube / fluorocarbon resin composite microsphere photo-thermal super-hydrophobic anti-condensation coating, which comprises the following steps:

[0005] Dissolve fluorocarbon resin in a solvent, and add carbon nanotubes and 1H 1H, 2H 2H perfluorodecyltriethoxysilane PFDTES to form a uniform dispersion liquid;

[0006] Add a small amount of a non-solvent to the dispersion liquid to form a carbon nanotube / fluorocarbon resin composite microsphere dispersion liquid;

[0007] Spray the carbon nanotube / fluorocarbon resin composite microsphere dispersion liquid on the surface of a substrate, and cure at room temperature to obtain the carbon nanotube / fluorocarbon resin composite microsphere photo-thermal super-hydrophobic anti-condensation coating.

[0008] In some possible embodiments, the carbon nanotube / fluorocarbon resin composite microsphere dispersion liquid is mixed from a fluorocarbon resin main agent, a fluorocarbon resin curing agent, a solvent, carbon nanotubes CNT, 1H 1H, 2H 2H perfluorodecyltriethoxysilane PFDTES and a non-solvent, and consists of the following mass fractions:

[0009] 20-60 parts of fluorocarbon resin main agent, 3-9 parts of fluorocarbon resin curing agent, 160-240 parts of solvent, 8-16 parts of carbon nanotubes, 8-12 parts of PFDTES and 20-100 parts of non-solvent water.

[0010] In some possible embodiments, the fluorocarbon resin curing agent is an isocyanate curing agent.

[0011] In some possible embodiments, the solvent is one or both of ethyl acetate and butyl acetate.

[0012] In some possible embodiments, the dispersion mode is magnetic stirring, and the rotation speed ranges from 500 r / min to 1000 r / min.

[0013] In some possible embodiments, the spraying mode is air spraying by a spray gun, and the nozzle diameter of the spray gun is 1.3 mm.

[0014] In some possible embodiments, the curing time of the ambient temperature curing ranges from 1 h to 3 h.

[0015] In some possible embodiments, the substrate material is glass fiber reinforced plastic, glass, and metal surface.

[0016] In the second aspect, the embodiments of the present application provide a carbon nanotube / fluorocarbon resin composite microsphere photo-thermal super-hydrophobic anti-condensation coating prepared by the preparation method described above.

[0017] In the third aspect, the embodiments of the present application provide an application of the carbon nanotube / fluorocarbon resin composite microsphere photo-thermal super-hydrophobic coating described above in an anti-icing and de-icing material.

[0018] Compared with the prior art, the present application has at least the following beneficial effects:

[0019] 1. In the embodiments of the present application, fluorocarbon resin with low surface energy is used as an adhesive on glass fiber reinforced plastic, carbon nanotubes are used as photo-thermal materials and provide certain micro-nano structures, PFDTES further reduces the surface energy, and the dispersion liquid of fluorocarbon resin and carbon nanotubes is sprayed to obtain FEVE / CNT coating with photo-thermal performance and super-hydrophobic performance, the contact angle can reach 158°, the icing time can be greatly delayed, and the ice adhesion strength can be as low as 16 kPa. Under the irradiation of one sunlight, the temperature can be raised to 54.5℃ within ten minutes, and the ice and snow melting can be greatly accelerated. In addition, the layer has self-cleaning performance, which can effectively avoid surface pollution.

[0020] 2. The photo-thermal super-hydrophobic anti-condensation coating prepared in the embodiments of the present application has excellent anti-icing performance. Through comparative experiments, it can be known that the coating can greatly delay the icing time and also has excellent photo-thermal effect. DETAILED DESCRIPTION

[0021] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Unless otherwise specifically stated, the technical or scientific terms used in the embodiments of this invention should be understood in their ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms "comprising" or "including," as used in the embodiments of this invention, do not limit the shapes, numbers, steps, actions, operations, components, elements, and / or groups thereof mentioned, nor do they exclude the appearance or addition of one or more other different shapes, numbers, steps, actions, operations, components, elements, and / or groups thereof, or the inclusion of these.

[0023] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. Techniques, methods, and apparatus known to those skilled in the art may not be discussed in detail, but where appropriate, the illustrated techniques, methods, and apparatus should be considered part of the specification. In all examples shown and discussed herein, any other specific example may have different values.

[0024] In the description of the embodiments of the present invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In the embodiments of the present invention, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in the embodiments of the present invention, as well as the features of different embodiments or examples.

[0025] The following will describe in detail exemplary embodiments according to the present invention. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments of the present invention. It should be understood that the present invention is not limited to the exemplary embodiments described herein.

[0026] This invention provides a method for preparing a photothermal superhydrophobic anti-condensation coating of carbon nanotube / fluorocarbon resin composite microspheres, the method comprising the following steps:

[0027] Fluorocarbon resin was dissolved in a solvent, and carbon nanotubes and 1H 1H,2H 2H perfluorodecyltriethoxysilane (PFDTES) were added to form a uniform dispersion.

[0028] A small amount of non-solvent is added to the dispersion to form a carbon nanotube / fluorocarbon resin composite microsphere dispersion;

[0029] The carbon nanotube / fluorocarbon resin composite microsphere dispersion was sprayed onto the substrate surface and cured at room temperature to obtain the carbon nanotube / fluorocarbon resin composite microsphere photothermal superhydrophobic anti-condensation coating.

[0030] In some embodiments, the carbon nanotube / fluorocarbon resin composite microsphere dispersion is composed of a fluorocarbon resin main agent, a fluorocarbon resin curing agent, a solvent, carbon nanotubes (CNTs), 1H₁₁H₂,2H₂H₂perfluorodecyltriethoxysilane (PFDTES), and a non-solvent, and comprises the following mass fractions:

[0031] 20 to 60 parts of fluorocarbon resin main agent, 3 to 9 parts of fluorocarbon resin curing agent, 160 to 240 parts of solvent, 8 to 16 parts of carbon nanotubes, 8 to 12 parts of PFDTES and 20 to 100 parts of non-solvent water.

[0032] In some embodiments, the fluorocarbon resin curing agent is an isocyanate curing agent.

[0033] In some embodiments, the solvent is one or both of ethyl acetate and butyl acetate.

[0034] In some embodiments, the dispersion method is magnetic stirring, with a rotation speed range of 500 r / min to 1000 r / min.

[0035] In some embodiments, the spraying method is air spraying with a spray gun, and the nozzle diameter of the spray gun is 1.3 mm.

[0036] In some embodiments, the curing time at room temperature ranges from 1 hour to 3 hours.

[0037] In some embodiments, the substrate material is fiberglass, glass, or a metal surface.

[0038] This invention also provides a photothermal superhydrophobic anti-condensation coating of carbon nanotube / fluorocarbon resin composite microspheres prepared according to the preparation method described above. For details, please refer to the relevant description above, which will not be repeated here.

[0039] This invention also provides an application of the carbon nanotube / fluorocarbon resin composite microsphere photothermal superhydrophobic anti-condensation coating described above in anti-icing and de-icing materials. For details, please refer to the relevant description above, which will not be repeated here.

[0040] Compared with the prior art, the embodiments of the present invention have at least the following beneficial effects:

[0041] 1. This invention utilizes fluorocarbon resin with low surface energy as an adhesive on fiberglass, carbon nanotubes as a photothermal material providing a certain micro / nano structure, and PFDTES to further reduce surface energy. Spraying a dispersion of fluorocarbon resin and carbon nanotubes yields a FEVE / CNT coating with photothermal and superhydrophobic properties, achieving a contact angle of up to 158°. This significantly delays freezing time and reduces ice adhesion, which can be as low as 16 kPa. Under sunlight irradiation, the temperature can rise to 54.5°C within ten minutes, greatly accelerating ice and snow melting. Furthermore, this coating possesses self-cleaning properties, effectively preventing surface contamination.

[0042] 2. The photothermal superhydrophobic anti-condensation coating prepared in the embodiments of the present invention has excellent anti-icing properties. Comparative experiments show that the coating can greatly delay the freezing time and also has excellent photothermal effects.

[0043] The preparation method of the carbon nanotube / fluorocarbon resin composite microsphere photothermal superhydrophobic anti-condensation coating of the present invention will be described in detail below with several specific embodiments.

[0044] Example 1

[0045] A method for preparing a photothermal superhydrophobic anti-condensation coating of carbon nanotube / fluorocarbon resin composite microspheres includes the following steps:

[0046] (1) Clean the surface of the fiberglass substrate. The specific steps are: rinse with deionized water once or twice, rinse the surface with alcohol once, and gently blow dry with a nitrogen gun.

[0047] (2) Mix 20 parts of fluorocarbon resin main agent and 3 parts of fluorocarbon resin curing agent isocyanate and add 160 parts of butyl acetate. Stir at room temperature to form a fluorocarbon resin solution.

[0048] (3) Add 8 parts of carbon nanotubes to the fluorocarbon resin solution and stir at room temperature to form a dispersion of fluorocarbon resin and carbon nanotubes.

[0049] (4) Slowly add 8 parts of PFDTES to the dispersion of fluorocarbon resin and carbon nanotubes and stir at room temperature.

[0050] (5) Add 20 parts of water to the dispersion to form a carbon nanotube / fluorocarbon resin composite microsphere dispersion.

[0051] (6) Spray the above-mentioned dispersion of fluorocarbon resin and carbon nanotubes onto the substrate surface and cure at room temperature to obtain a carbon nanotube / fluorocarbon resin composite microsphere photothermal superhydrophobic anti-condensation coating.

[0052] Example 2

[0053] A method for preparing a photothermal superhydrophobic anti-condensation coating of carbon nanotube / fluorocarbon resin composite microspheres includes the following steps:

[0054] (1) Clean the surface of the fiberglass substrate. The specific steps are: rinse with deionized water 1-2 times, rinse the surface with alcohol once, and gently blow dry with a nitrogen gun.

[0055] (2) Mix 40 parts of fluorocarbon resin main agent and 6 parts of fluorocarbon resin curing agent isocyanate and add 200 parts of butyl acetate. Stir at room temperature to form a fluorocarbon resin solution.

[0056] (3) Add 12 parts of carbon nanotubes to the fluorocarbon resin solution and stir at room temperature to form a dispersion of fluorocarbon resin and carbon nanotubes.

[0057] (4) Slowly add 10 parts of PFDTES to the dispersion of fluorocarbon resin and carbon nanotubes and stir at room temperature.

[0058] (5) Add 60 parts of water to the dispersion to form a carbon nanotube / fluorocarbon resin composite microsphere dispersion.

[0059] (6) Spray the above-mentioned dispersion of fluorocarbon resin and carbon nanotubes onto the substrate surface and cure at room temperature to obtain a carbon nanotube / fluorocarbon resin composite microsphere photothermal superhydrophobic anti-condensation coating.

[0060] Example 3

[0061] A method for preparing a photothermal superhydrophobic anti-condensation coating of carbon nanotube / fluorocarbon resin composite microspheres includes the following steps:

[0062] (1) Clean the surface of the fiberglass substrate. The specific steps are: rinse with deionized water 1-2 times, rinse the surface with alcohol once, and gently blow dry with a nitrogen gun.

[0063] (2) Mix 60 parts of fluorocarbon resin main agent and 9 parts of fluorocarbon resin curing agent isocyanate and add 240 parts of butyl acetate. Stir at room temperature to form a fluorocarbon resin solution.

[0064] (3) Add 16 parts of carbon nanotubes to the fluorocarbon resin solution and stir at room temperature to form a dispersion of fluorocarbon resin and carbon nanotubes.

[0065] (4) Slowly add 12 parts of PFDTES to the dispersion of fluorocarbon resin and carbon nanotubes and stir at room temperature.

[0066] (5) Add 100 parts of water to the dispersion to form a carbon nanotube / fluorocarbon resin composite microsphere dispersion.

[0067] (5) Spray the above-mentioned dispersion of fluorocarbon resin and carbon nanotubes onto the substrate surface and cure at room temperature to obtain a carbon nanotube / fluorocarbon resin composite microsphere photothermal superhydrophobic anti-condensation coating.

[0068] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A method for preparing a photothermal superhydrophobic anti-condensation coating of carbon nanotube / fluorocarbon resin composite microspheres, characterized in that, The method includes the following steps: Fluorocarbon resin was dissolved in a solvent, and carbon nanotubes and 1H 1H,2H 2H perfluorodecyltriethoxysilane (PFDTES) were added to form a uniform dispersion. A small amount of non-solvent is added to the dispersion to form a carbon nanotube / fluorocarbon resin composite microsphere dispersion; The carbon nanotube / fluorocarbon resin composite microsphere dispersion was sprayed onto the substrate surface and cured at room temperature to obtain the carbon nanotube / fluorocarbon resin composite microsphere photothermal superhydrophobic anti-condensation coating.

2. The method for preparing the carbon nanotube / fluorocarbon resin composite microsphere photothermal superhydrophobic anti-condensation coating according to claim 1, characterized in that, The carbon nanotube / fluorocarbon resin composite microsphere dispersion is composed of fluorocarbon resin main agent, fluorocarbon resin curing agent, solvent, carbon nanotubes (CNTs), 1H₁₁H₂,2H₂₂H perfluorodecyltriethoxysilane (PFDTES), and non-solvent, and consists of the following mass fractions. composition: 20 to 60 parts of fluorocarbon resin main agent, 3 to 9 parts of fluorocarbon resin curing agent, 160 to 240 parts of solvent, 8 to 16 parts of carbon nanotubes, 8 to 12 parts of PFDTES and 20 to 100 parts of non-solvent water.

3. The method for preparing the photothermal superhydrophobic anti-condensation coating of carbon nanotube / tube fluorocarbon resin composite microspheres according to claim 2, characterized in that, The fluorocarbon resin curing agent is an isocyanate curing agent.

4. The method for preparing the carbon nanotube / fluorocarbon resin composite microsphere photothermal superhydrophobic anti-condensation coating according to claim 2, characterized in that, The solvent is one or both of ethyl acetate and butyl acetate.

5. The method for preparing the carbon nanotube / fluorocarbon resin composite microsphere photothermal superhydrophobic anti-condensation coating according to any one of claims 1 to 4, characterized in that, The dispersion method is magnetic stirring, with a rotation speed range of 500 r / min to 1000 r / min.

6. The method for preparing the carbon nanotube / fluorocarbon resin composite microsphere photothermal superhydrophobic anti-condensation coating according to any one of claims 1 to 4, characterized in that, The spraying method is air spraying with a spray gun, and the nozzle diameter of the spray gun is 1.3mm.

7. The method for preparing the carbon nanotube / fluorocarbon resin composite microsphere photothermal superhydrophobic anti-condensation coating according to any one of claims 1 to 4, characterized in that, The curing time range for room temperature curing is 1 hour to 3 hours.

8. The method for preparing the carbon nanotube / fluorocarbon resin composite microsphere photothermal superhydrophobic anti-condensation coating according to any one of claims 1 to 4, characterized in that, The base materials are fiberglass, glass, and metal surfaces.

9. A photothermal superhydrophobic anti-condensation coating of carbon nanotube / fluorocarbon resin composite microspheres prepared by the preparation method according to any one of claims 1 to 8.